[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla lipobranchia
               Branch Monocondyla
                 Class Reptilia Linnaeus, 1758 - reptiles
                   Subclass Crocodilia
                     Order Alligatores
                       1 Genus Crocodilus Gmelin, 1789 see Genus Crocodylus Laurenti, 1768
                       2 Genus Gavialis Oppel, 1811
                       3 Genus Alligator Cuvier, 1817